extended MSSM

Extended Minimal Flavour Violating MSSM

The recently reported measurements of the CP asymmetry aψK by the BABAR and BELLE collaborations are in good agreement with the standard model prediction. With the anticipated precision in aψK at the B factories and hadron colliders, one hopes to pin down any possible deviation from the SM. We discuss an extension of the MFV-supersymmetric models which comfortably accommodates the current measu...

Sneutrino Cold Dark Matter in Extended Mssm Models

A thorough analysis of sneutrinos as dark matter candidates is performed, in different classes of supersymmetric models, as is typically done for the neutralino dark matter. First in the Minimal Supersymmetric Standard Model, sneutrinos are marginally compatible with existing experimental bounds, including direct detection, provided they compose a subdominant component of dark matter. Then supe...

GeV resonance in the gauged U ( 1 ) ' - extended MSSM

Extended Minimal Flavour Violating MSSM and Implications for B Physics

The recently reported measurements of the CP asymmetry aψK by the BABAR and BELLE collaborations, obtained from the rate differences in the decays B0 → (J/ψKs), (J/ψKL) etc., and their charge conjugates, are in good agreement with the standard model (SM) prediction of the same, resulting from the unitarity of the CKM matrix. The so-called minimal flavour violating (MFV) supersymmetric extension...

CP violation in the secluded U(1)′-extended MSSM

We study the Higgs sector of the secluded U(1)′-extended MSSM (sMSSM) focusing on CP violation. Using the one-loop effective potential that includes contributions from quarks and squarks in the third generation, we search for the allowed region under theoretical and experimental constraints. It is found that the possible region for the electroweak vacuum to exist is quite limited, depending on ...